Ti-IF和Nb+Ti-IF钢罩式退火析出行为与织构的对比研究  

Comparative Study on Precipitation Behavior and Texture Formation of Ti-IF Steel and Nb+Ti-IF Steel during Batch Annealing

作　　者：冯岩青[1,2] 王福明[1] 

机构地区：[1]北京科技大学,北京100083 [2]包钢技术中心,内蒙古包头014010

出　　处：《钢铁钒钛》2012年第5期66-69,共4页Iron Steel Vanadium Titanium

摘　　要：采用X-衍射仪技术并结合金相显微镜、扫描电子显微镜(SEM)、透射电镜(TEM),研究了加Nb和不加Nb两种罩式退火的无间隙原子钢的金相组织、析出行为及织构。试验结果表明:Nb没有明显改善再结晶织构,但通过Nb增加Ti在点阵中的有效固溶度,在形成TiN、TiC、TiS析出物的同时增加了TiN的数量和尺寸;Nb作为细化晶粒元素在卷曲过程和再结晶退火过程中抑制了晶粒长大,同时使碳氮化物析出颗粒粗大并且降低了γ纤维中的{111}〈110〉织构组分。Precipitation behavior and texture formation of the two interstitial-free steels with bib and without Nb addition during cold rolling-batch annealing process were investigated by using metallographie microscope, scanning electron microscope （SEM）, transmission electron microscope（TEM） and X-ray diffraction（XRD） instrument. The results show that Nb does not significantly improve the recrystallization texture; however, it promotes the formation of TiN, TiC and TiS and increases the number and size of TiN precipitate by increasing the effective solid solubility of Ti in the matrix; as a good grain refiner, Nb inhibits grain growth during coiling and recrystallization annealing; the addition of Nb tends to coarsen the carbonitride precipitates and reduce the volume fraction of the { 111 } 〈 110 〉 texture component in the γ fiber.

关 键 词：Ti—IF钢 Nb+Ti—IF钢 金相组织 析出相 织构 

分 类 号：TG156.2[金属学及工艺—热处理] TG115.22[金属学及工艺—金属学]